The New Balance 8574 is the first time you will see a classic-inspired upper on the NB Zip™ unit. This modern interpretation of the 574 is grounded in the authentic performance technology, NB Zip™. The upper is leather/suede which provides a natural comfort. NB Zip™ technology is a responsive cushioning that provides supreme support. ABZORB® SBS in the forefoot gives optimal shock absorption with no compression set. The ACTEVA® Lite midsole is a lightweight foam with optimal compression set properties, and the N-durance® outsole is a rubber compound for maximum durability in high-wear areas.